摘要:
Dielectric substrate for application to ultrahigh frequencies (antenas, circulators, screened or unscreened cables, ...). Said substrate is comprised of a material belonging to the fullerene family, such as C60. It has low density, low losses, and its dielectric constant is between 2 and 3, which is optimal for ultrahigh frequency applications.
摘要:
A method for reducing the amplitude of vibration and the pressure wave (6) from a radiating surface (5) and/or an incident surface (3) of a material exposed to mechanical and/or acoustic vibration. The material consists of an anisotropically shaped heavy resilient structure with an internal geometry capable of deflecting and localizing vibration (7) within the structure. A specific material may be incorporated into the areas where vibrational energy is localized in order to convert the vibrational energy into another form of energy.
摘要:
A material for semiconductor screens and its use for manufacturing cables, capacitors and electromagnetic shielding for electrical and electronic devices, are described. Cables and electrical and electronic devices containing said material are also described. The semiconductor screen consists of a polymeric matrix containing one or more polymers and 5-70 % by weight of one or more dispersed, conjugated and undoped polymers. In the absence of an electrical field, screen conductivity is very low, but conductivity increases in proportion to the field applied (see curves 2-9 in the figure).
摘要:
Materials with ferromagnetic properties comprising organic molecules with magnetic properties, and methods for making same, are disclosed. The molecules have the following general formula: A=N-B, wherein A=N- is an alpha -substituted conjugated-structure cyclic amine, with N being the nitrogen atom; and B- is an alpha -substituted cyclic radical. Said materials with ferromagnetic properties may be used in a variety of fields and particularly in any electro-magneto-optical and electro-magneto-resistive system.
摘要:
The invention discloses self-doped conductive polyanilines and a method for preparing them. The benzene and/or quinone rings of these polyanilines bear functionalized grafts, or substituants, corresponding to the formula: -A-Z where A is a hydrocarbon radical having 2 to 8 atoms interrupted by at least one hetero-atom, Z is a strong acid function or one of its salts.